diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQL81Dialect.java b/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQL81Dialect.java
index b3d36326d3..736f50a254 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQL81Dialect.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQL81Dialect.java
@@ -104,6 +104,7 @@ public class PostgreSQL81Dialect extends Dialect {
 		registerFunction( "variance", new StandardSQLFunction("variance", StandardBasicTypes.DOUBLE) );
 
 		registerFunction( "random", new NoArgSQLFunction("random", StandardBasicTypes.DOUBLE) );
+		registerFunction( "rand", new NoArgSQLFunction("random", StandardBasicTypes.DOUBLE) );
 
 		registerFunction( "round", new StandardSQLFunction("round") );
 		registerFunction( "trunc", new StandardSQLFunction("trunc") );